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金厂金矿是我省当前唯一的大型金矿床,也是国内已知由超基性岩提供金质、构成大型金矿床的唯一实例。本文介绍了矿区地质概况和矿床地质特征,从矿源岩(含矿的超基性岩)属性、硫同位素组成、硅质来源、超基性岩含金丰度值及其风化壳和硅化岩的金富集、包裹体特征及成矿温度、活化转移条件——超基性岩热液蚀变序列的存在等方面,对金(镍)矿床的形成进行了探讨。认为它是由超基性岩经酸性热液蚀变而形成的中温热液型(为主)金矿床。“超基性岩蚀变热液型金矿床”,在岩金矿床中是新的类型,在矿床成因学上是新的概念。
Jinchang Gold Mine is the only large-scale gold deposit in our province and also the only known example of gold provided by ultrabasic rocks in China. This paper introduces the geology of the mining area and the geological characteristics of the deposit. The characteristics of ore deposits (ultramafic rocks containing ore), sulfur isotopic compositions, siliceous sources, ultrabasic rocks, and their weathered crust and silicified rock Gold enrichment, characteristics of inclusions and metallogenic temperature, and the conditions of activation and migration - the existence of ultrabasic petrothermal alteration sequences, the formation of gold (nickel) deposits is discussed. It is believed that it is a mesothermal hydrothermal (mainly) gold deposit formed by acid hydrothermal alteration of ultrabasic rocks. “Ultrabasic petrological-hydrothermal gold deposit” is a new type in the rock-gold deposit and is a new concept in deposit genesis.